Thinkpad L540 - what is the name of the Super I/O chip that control fan and sensors?

[Insomniac1971]

Hi,

Anyone here know the name of the Super I/O chip in the L540 20AU (HM86 EXPRESS CHIPSET)?

I need the information to solve an issue in Linux Mint, where fan is not detected correctly.

If anyone know the excact name of the sensor that show fan speed it would also be great.

I tried looking on my motherboard but can't see it without taking the laptop apart and I really don't want to do that. I asked Lenovo, but they are not answering. I searched google for photos of the motherboard which according to Lenovo spare parts for my model is the following :

Lenovo Thinkpad L540 20AUA0F4JP Serial R902K1R2
https://pcsupport.lenovo.com/uu/en/prod ... p/r902k1r2

Motherboard
Lenovo BDPLANAR LPD-1 4600 HM86 N-vPro Y-TPM/AES W8P
Part No 00HM560

substitute
FRU Planar W8S HM86 Y/Exp Y/TPM Part No 00HM562

Photos on google are blurry around the chip.

Hope one of you guys can help me out and tank you in advance.

Jan

[RealBlackStuff]

Item # U2601 on the motherboard, chip P/N: EMC2103-2-AP-GP
https://www.microchip.com/en-us/product/emc2103-2

[axur-delmeria]

If the image at https://laptop-schematics.com/view/11100/ is accurate, the Nuvotron NCPE985P controls the fans, while the EMC2103 handles the sensors.